When locking with two nuts, the thin nut should be placed inside the thick nut, and no two identical washers should be used under each nut

2018-12-06View Original

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No two identical washers shall be used under each nut? What does it mean? Are they the washers between the thin nut and the equipment, and the washers between the thin nut and the thick nut? Question: Are washers also needed between thin nuts and thick nuts?

Reply #22018-12-06

Could LZ share this PDF? :lol

Reply #32018-12-07

The new standard no longer includes this requirement; it is specified in SHT 3538-2017, General Specifications for the Construction and Acceptance of Petrochemical Machinery and Equipment Installation Projects.

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When locking with two nuts, the thin nut should be placed inside the thick nut, and no two identical washers should be used under each nut

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